Magnetic recording medium with a recording layer composed of lam

Details Magnetic recording medium with a recording layer composed of lam Magnetic recording medium with a recording layer composed of lam

1995-01-23

1997-01-07

Kiliman, Leszek

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428336, 428694MT, 428694NF, 428694XS, 428694MM, 428694T, 428694TS, 428694TM, 427127, 427128, 427129, 427130, G11B 566

Patent

active

055915159

ABSTRACT:
A magnetic recording medium with a superior magnetic properties and a high anticorrosive resistance comprises a substrate and a magnetic recording layer formed on the substrate. The magnetic recording layer is composed of first thin films comprising a rare earth-transition metal magnetic alloy and second thin films comprising a non-magnetic material composed of either one of a metal, a semiconductive material or a dielectric material, laminated in at least two sets. Total thickness of a set of the first and second films is within a range from 15 to 100 .ANG..
A method for preparing the magnetic recording medium comprises a first step for forming a thin film from a rare earth-transition metal magnetic alloy on the substrate and a second step for forming a thin film from a non-magnetic material composed of a metal, a semiconductive material or a dielectric material on the substrate, wherein the first and second steps are alternately repeated at least two cycles while rotating the substrate.

REFERENCES:
patent: 4578322 (1986-03-01), Sawamura et al.
patent: 4789606 (1988-12-01), Yamada
patent: 4837118 (1989-06-01), Yamamoto
patent: 4922454 (1990-05-01), Taki

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